A breast self-exam involves checking for visual changes, unusual lumps, nipple abnormalities, and swollen lymph nodes near the armpit. The goal isn’t to diagnose anything yourself but to learn what your breasts normally look and feel like so you can spot changes early. Here’s what to pay attention to and how to tell the difference between normal tissue and something worth getting checked.
When to Do Your Self-Exam
If you’re still menstruating, the best time is a few days after your period ends, during the early follicular phase (roughly days 7 through 10 of your cycle). Breast tissue swells and becomes tender in the second half of the cycle, the luteal phase, which can make normal tissue feel lumpy and harder to assess. Checking during the same window each month gives you the most consistent baseline.
If you’re postmenopausal or don’t have regular periods, pick any consistent day each month, like the first of the month, so it becomes routine.
Visual Changes to Check First
Start by standing in front of a mirror with your arms at your sides, then raise them overhead. You’re looking for changes in size, shape, or symmetry that are new. Most people have some natural asymmetry, so what matters is a change from your usual appearance.
Specific skin changes to watch for:
- Dimpling or puckering: The skin pulls inward, sometimes looking like the surface of an orange peel. This texture change, sometimes called peau d’orange, can signal that something underneath is tethering the skin.
- Redness or swelling: One breast looking noticeably redder, warmer, or more swollen than the other.
- Bulges or ridges: New contour changes that appear when you raise your arms or press your hands against your hips to flex your chest muscles.
Repeat this visual check from the side. Some changes only become visible at certain angles.
What a Concerning Lump Feels Like
Normal breast tissue is naturally uneven. Many people have a general lumpiness, especially in the upper outer area near the armpit. The key isn’t finding something that feels bumpy; it’s finding something that feels distinctly different from the tissue around it.
A lump worth getting checked typically feels harder than the surrounding breast. It may have irregular edges rather than smooth, round borders. Early on, a concerning lump may still move slightly under your fingers, but it tends to feel more fixed in place as it grows. The tissue feels noticeably different from anything else in either breast.
Benign lumps, like cysts, tend to feel smooth, round, and rubbery. They often move easily when you press on them. That said, you can’t reliably tell benign from concerning by feel alone. Any new, distinct lump that persists beyond one full menstrual cycle is worth having evaluated.
How to Feel the Entire Breast
Lie down on your back with a pillow under the shoulder of the breast you’re checking. This spreads the tissue flat against your chest wall, making it easier to feel deeper structures. Use the pads of your three middle fingers, not the tips, and press in small circles about the size of a coin.
Use three levels of pressure at each spot: light pressure to feel the tissue just beneath the skin, medium pressure for the middle layer, and firm pressure to reach the tissue closest to your chest wall and ribs. At the deepest pressure, you should feel the firmness of your ribcage underneath.
Cover the entire breast in a systematic pattern. Most people find it easiest to move in vertical strips from the collarbone down to the bra line, then shift over slightly and move back up, working across the full width of the breast. The area you need to cover extends from the collarbone to below the breast fold, and from the breastbone to the midline of the armpit.
Don’t Skip the Armpit Area
Breast tissue extends further than most people realize. The upper outer quadrant reaches toward the armpit in a section called the tail of Spence, and the lymph nodes in your armpit drain fluid from the breast. Both areas need attention during a self-exam.
To check, lower your arm slightly so the muscles relax, then press into the armpit with your opposite hand. Feel for firm, swollen nodes. Also check above your collarbone, where a second group of lymph nodes sits. A swollen node doesn’t automatically mean cancer (infections and immune responses cause temporary swelling), but a node that stays enlarged for more than two weeks without an obvious cause is something to bring up with your doctor.
Nipple and Areola Changes
Gently squeeze each nipple to check for discharge. Not all discharge is concerning. Milky or clear discharge from both breasts can result from hormonal shifts or medications. What raises a red flag is spontaneous discharge from a single nipple, especially if it’s bloody or comes from one specific duct opening.
Other nipple changes to watch for:
- New inversion: A nipple that has always pointed inward is usually just your anatomy. A nipple that was previously outward and has recently pulled in is a different story.
- Scaling or crusting: Flaking, redness, or sore patches on the nipple or areola that don’t heal. This can resemble eczema but may indicate a rare type of breast cancer that starts in the nipple skin.
- Rash: Persistent redness or irritation around the nipple that doesn’t respond to typical skin treatments.
What Warrants a Call to Your Doctor
Any single change from this list is enough reason to schedule an appointment: a new lump that persists, skin dimpling or puckering, bloody nipple discharge, a newly inverted nipple, persistent redness or swelling in one breast, or a rapidly growing mass. Most findings turn out to be benign, but there’s no way to confirm that without imaging.
What Happens After You Report a Change
Your doctor will do a clinical breast exam, checking your breasts, chest wall, underarms, and neck while you’re sitting upright and again while lying down. From there, the next step is usually a diagnostic mammogram, which is more targeted than the routine screening version. Your radiologist will know exactly which area to focus on.
If the mammogram doesn’t provide a clear answer, a focused ultrasound uses sound waves to look more closely at the specific spot of concern. This is especially useful for distinguishing fluid-filled cysts from solid masses. In some cases, particularly if you have very dense breast tissue, an MRI may be ordered even if the mammogram and ultrasound look normal.
If imaging still can’t rule out a problem, the next step is a biopsy, where a needle guided by ultrasound takes a small tissue sample for lab analysis. The entire process from your first appointment to a definitive answer typically takes days to a couple of weeks, depending on scheduling and how many steps are needed.